JPH0475337B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an exterior wall construction method using two-tier suspended scaffolding, which is used for new construction, repair work, etc. of the exterior wall of a building.

(Conventional technology) In urban areas, for effective use of land,
Buildings are often built on entire lots. In that case,
If there is no space to erect scaffolding around the building, it is common practice to borrow space above the ground and install brackets overhanging the exterior wall surface, and then erect a frame scaffold on top of the brackets. In addition, frame scaffolding is expensive, so depending on the structure and grade of the building, it may be over-equipped.

In order to solve the above problem, currently the fifth
The suspended scaffolds shown in Figures A and B have been put into practical use. This hanging scaffold is suspended by two wires a, and each hanging wire a has a
A winch b for lifting and lowering is attached, and a net-shaped curing sheet c is attached to the wire a.

However, even if this suspended scaffolding is used, each hanging wire a has a winch b attached to it, so
The advantage in terms of cost was small, and since the curing sheet c was stretched over the hanging wire a, it was extremely unstable in strong winds, and there was also a problem in terms of safety.

Furthermore, depending on the nature of the exterior wall work, such as the installation of exterior panels, it is desirable to work simultaneously at two locations, one above and one above on each floor, and in this case, suspended scaffolds will be placed in two stages, one above and one below.

This type of exterior wall construction method using two-tier suspended scaffolding is as follows:
This has already been proposed in Japanese Unexamined Patent Publication No. 143065/1983.

This method involves suspending a work/fall prevention gondola, which is approximately the same width as the exterior wall of the building, using the gondola or a winch installed on the roof so that it can be driven up and down.
A curing sheet is attached to the hanging wire of this gondola, and a narrow working gondola equipped with a lifting winch is suspended above the gondola, and these two gondolas are used as scaffolding to attach the exterior plate, etc. It is something to do.

However, even with this method, the upper and lower gondolas are each driven up and down by dedicated winches, which is disadvantageous in terms of cost and lacks stability in strong winds, as shown in Figure 5. This method has the same drawbacks as the prior art shown in , b.

(Problems to be Solved by the Invention) In view of the above-mentioned conventional drawbacks, the present invention reduces the number of winches to achieve cost reduction, as well as increases the stability of the suspended scaffolding in strong winds and improves safety. This is what I am trying to do.

(Means for Solving the Problems) The method for constructing an exterior wall using two-tier suspended scaffolding according to the present invention involves arranging a plurality of stages continuously along the exterior wall of a building over almost the entire width of the exterior wall. Suspended, these are positioned above the stage.
A gondola, which is narrower than the stage and equipped with a winch for driving up and down, is suspended, and a curing sheet is provided outside the stage by attaching it to a wire provided separately from the stage suspension wire. The above-mentioned purpose is achieved by using the gondola and stage as scaffolding to perform exterior wall work on a certain floor, and then hoisting the stage to the upper floor using the gondola.

(Function) According to the above configuration, the stage that is continuously located over almost the entire width of the exterior wall surface can be used as a work scaffold for exterior wall construction, a shelf to prevent falling, a passageway when changing the position of the gondola laterally, etc. fulfill its role as
The wind pressure applied to the curing sheet is supported by a wire that is separate from the stage's suspension wire, so the shaking of the stage is suppressed. After the exterior wall work on a certain floor is completed, the stage will be hoisted up to the upper floor by a gondola, so a lift drive winch installed on the gondola will be used to hoist the stage.

(Example) An example of the present invention will be described based on the drawings. Figure 1 is a perspective view showing an outline of the method for constructing an exterior wall using two-tier suspended scaffolding of the present invention, Figure 2 is a vertical side view thereof, and Figure 2 is a vertical side view of the method. 3 is a perspective view of the hanging device, and FIG. 4 is a partially cutaway front view thereof.

In the figure, 1 is a building constructed using the curtain wall construction method, and a hanging device 2 is installed on the roof of the building. The hanging device 2 consists of an overhanging beam 3 made of H steel for hanging, a rear column 5 made of H steel that is connected to the rear end of the beam 3 with a bolt 4 that can be disassembled, and a longitudinally intermediate portion of the beam 3 that can be disassembled. An intermediate support 7 is connected with bolts 6 to the beam 3, and is installed between the parts of the beam 3 that protrude from the outer wall surface, and is fixed by a U-bolt 8 passing through the upper flange of the beam 3 and a nut screwed thereto. It is composed of a steel square pipe 9, etc.

The lower end of the rear column 5 is fixed by an embedded anchor bolt 11 installed in advance at a predetermined position on the roof slab 10 and a nut 12 screwed into the bolt, and the lower end of the intermediate column 6 is fixed by a hole installed on the upper surface of the parapet 13. It is fixed by an in-anchor (or a pre-installed embedded anchor bolt) 11'.

Further, the intermediate support 7 is provided with bolt holes 14 in a plurality of upper and lower stages so that the beam 3 can be installed almost horizontally even if the height of the parapet 13 changes. To explain in more detail, the intermediate support 7
is a substrate 7a placed on the upper surface of the parapet 13;
It consists of a pair of channel materials 7b, 7c standing upright on the upper surface with a predetermined interval, and a reinforcing plate 7d fixed to both 7a, 7b, 7c by welding. Said bolt hole 1
4... is drilled. On the other hand, in the middle part of the beam 3, a pair of plates 16a and 16b are fixed by welding, and a steel round pipe 15 is installed at the lower end.
is fixed by welding. Then, the beam 3 is placed between the channel members 7b and 7c, and the plate 1
6a, 16b are placed in close contact with or close to the opposing inner surfaces of the channel members 7b, 7c, and the bolt 6 is inserted across the bolt hole 14 at a desired position and the round pipe 15, Natsu is screwed onto this. This is designed to prevent bending moment from being applied to the bolt 6.

In the suspension device 2, a curing sheet attachment wire 17 is suspended from the tip of the beam 3, and stage suspension wires 18 are suspended from the vicinity of the tip of the beam 3 and the vicinity of the outer wall surface, respectively. A gondola hanging wire 19 is suspended from the square pipe 9 so that the hanging position can be changed.

In this state, the portable gondola 21 equipped with the lifting drive winch 20 is connected to the wire 19...
After being suspended by the wires 18, the stage 22 assembled from the beam and aluminum plates is suspended by the wires 18. These stages 22... are suspended so as to be continuously positioned over almost the entire width of the outer wall surface of the building.

Each stage 22 has a horizontal width (width in the direction along the outer wall surface) of about 5 m, a longitudinal width (width in the direction perpendicular to the outer wall surface) of about 1.2 m, and a dead weight of about 150 kg. As shown in the diagram, the gondola 21 is narrower than each stage 22 in both the front, rear, left, and right, and has a weight of approximately 240 kg.
The load capacity is approximately 300Kg.

After suspending all the stages 22..., the curing sheet fixing beam 23... is attached to the beam 24 below the stage 22..., and the wire 17 is attached to this.
Fix the bottom end of...

After that, the gondola 21 is raised to the top, the single cloth tube 25 is attached to the tip of the beam 3 with a clamp, the edge of the net-shaped curing sheet 26 is fixed to this, and the curing sheet 26 is fixed. hang down. Next, while lowering gondola 21,
The curing sheet 26 is tied to the wires 17, and the erection of the two-tier suspended scaffold and the tensioning of the curing sheet are completed.

Then, using the gondola 21 and stage 22... as scaffolding, work on the exterior wall of the floor where stage 22... is located (for example, installation of exterior version W, exterior repair, etc.) is performed, and then stage 22 and gondola 22...
are connected by a wire 27..., the winch 20 equipped on the gondola 21 is operated, and each stage 22 is lifted to the upper floor by the gondola 21,
The suspended scaffolding will be replaced.

The stage 22 serves not only as a work platform but also as a shelf to prevent falls and a passageway for laterally changing the position of the gondola 21.

(Effects of the Invention) The present invention has the above-mentioned configuration, and since the stage is lifted to the upper floor by the gondola, the winch for driving up and down that is equipped on the gondola is used as a winch for lifting the stage. ,
Since there is no need for a dedicated winch to lift the stage, costs can be reduced by reducing the number of winches.

In particular, according to the present invention, the curing sheet is provided outside the stage and is attached to a wire provided separately from the stage suspension wire, so that the gondola can move the stage without attaching or removing the curing sheet. Since the stage can be raised and lowered, and the wind pressure applied to the curing sheet is supported by a wire different from the stage suspension wire, the stage is stable in strong winds and safety can be improved.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
FIG. 1 is a schematic perspective view of the entire device, FIG. 2 is a longitudinal side view, FIG. 3 is a perspective view of the hanging device, and FIG. 4 is a partially cutaway front view of the device. FIGS. 5A and 5B are a schematic side view and a schematic plan view showing a conventional example. 1... Building, 17... Wire for attaching curing sheet, 18... Stage hanging wire, 20
... Lifting drive winch, 21 ... Gondola, 2
2... Stage, 26... Curing sheet.

Claims (1)

[Claims] 1 Multiple stages are suspended along the exterior wall of the building so that they are located continuously over almost the entire width of the exterior wall, and above these stages,
A gondola, which is narrower than the stage and equipped with a winch for driving up and down, is suspended, and a curing sheet is provided outside the stage by attaching it to a wire provided separately from the stage suspension wire. A method for constructing an exterior wall using a two-stage hanging scaffold, which comprises performing exterior wall construction on a certain floor using a gondola and a stage as scaffolding, and then hoisting the stage to an upper floor using the gondola.